The company and the DEP are reviewing between 500 and 600 violations, according to DEP spokeswoman Colleen Connolly.

Of those, 90 percent have been corrected, and Tennessee has given the DEP a commitment or plans to address the remaining 10 percent, Connolly said.

"We are still discussing and considering penalties. The penalties could include a fine," Connolly said.

It is the DEP's practice to track environmental violations on construction projects and calculate a fine when construction is complete.

Tennessee Gas, now part of the company Kinder Morgan, finished its "300 Line" project in November 2011. The upgrade involved the installation of seven looping segments in Pennsylvania and New Jersey totaling 127 miles of 30-inch pipeline to transport natural gas from Pennsylvania's fracking fields.

The project included 22 miles through Pike County, in Lackawaxen, Shohola and Milford townships.

The company racked up at least 45 environmental violations in Pike County for worksite conditions that had a potential for water pollution or actually created water pollution from disturbed soil being washed into pristine streams.